This years’ keynote speaker of the Delft3D Users Meeting is Prof. Rudy L Slingerland, Pennsylvania State University, USA.
For more than 37 years, Prof. Rudy L. Slingerland of the Pennsylvania State University, USA, has been active as a scientist, educator and academic leader. He has held numerous positions within the University including head of the Department of Geosciences. His research group currently studies the evolution of morphodynamic systems, including tectonically-driven landscapes, deltas, rivers and shallow marine shelves by coupling theory with observations in the field and subsurface. The group’s ultimate goal is to develop predictive theories for the behavior of these systems and the record of their deposits. He was also recognized with the 2012 G. K. Gilbert Award for Geomorphology from the American Geophysical Union (AGU), which honors a scientist who has made a significant contribution to the field of earth and planetary surface processes. In 2013, he was elected a Fellow of the AGU.
In his Keynote Lecture “Delta Dynamics using Delft3D” at the Delft3D Users Meeting on Tuesday, November 4, Prof. Rudy L. Slingerland will describe what he has learned about delta dynamics from Delft3D modeling studies. He will talk about the latest open source advances and will share his ideas for further improvements. This Keynote will be the start of an open discussion among engineers, geomorphologists, geologists and software developers to further collaborate in the development and research of morphodynamic systems worldwide.
Which instrument is right for you?
Soil hydraulic conductivity is the ability of a soil to transmit water in saturated, nearly saturated, or unsaturated conditions. But measuring hydraulic conductivity can be confusing. Which measurement is right for your application: saturated or unsaturated hydraulic conductivity? And which instrument should you use?
Make the right choice
In Soil Moisture 302, Leo Rivera, Research Scientist at METER, teaches which situations require saturated or unsaturated hydraulic conductivity and the pros and cons of common methods used to measure both parameters. Find out:
• When to measure saturated hydraulic conductivity
• When to measure unsaturated hydraulic conductivity
• Instruments that measure each parameter
• The technology behind each instrument
• Advantages vs. disadvantages of each method
It is about hydraulic conductivity and flow of water under ground .It will tell you about how water flows through hydraulic gradient .it will brief you about test which are performed to determine hydraulic conductivity .and experimental approach of it .
DSD-INT 2019 Fine sediments - transport in suspension, storage and supply - F...Deltares
Presentation by Prof. Dr. Mário J. Franca, IHE Delft & Delft University of Technology, The Netherlands, at the Delft3D - User Days (Day 3a: River morphodynamics), during Delft Software Days - Edition 2019. Wednesday, 13 November 2019, Delft.
This years’ keynote speaker of the Delft3D Users Meeting is Prof. Rudy L Slingerland, Pennsylvania State University, USA.
For more than 37 years, Prof. Rudy L. Slingerland of the Pennsylvania State University, USA, has been active as a scientist, educator and academic leader. He has held numerous positions within the University including head of the Department of Geosciences. His research group currently studies the evolution of morphodynamic systems, including tectonically-driven landscapes, deltas, rivers and shallow marine shelves by coupling theory with observations in the field and subsurface. The group’s ultimate goal is to develop predictive theories for the behavior of these systems and the record of their deposits. He was also recognized with the 2012 G. K. Gilbert Award for Geomorphology from the American Geophysical Union (AGU), which honors a scientist who has made a significant contribution to the field of earth and planetary surface processes. In 2013, he was elected a Fellow of the AGU.
In his Keynote Lecture “Delta Dynamics using Delft3D” at the Delft3D Users Meeting on Tuesday, November 4, Prof. Rudy L. Slingerland will describe what he has learned about delta dynamics from Delft3D modeling studies. He will talk about the latest open source advances and will share his ideas for further improvements. This Keynote will be the start of an open discussion among engineers, geomorphologists, geologists and software developers to further collaborate in the development and research of morphodynamic systems worldwide.
Which instrument is right for you?
Soil hydraulic conductivity is the ability of a soil to transmit water in saturated, nearly saturated, or unsaturated conditions. But measuring hydraulic conductivity can be confusing. Which measurement is right for your application: saturated or unsaturated hydraulic conductivity? And which instrument should you use?
Make the right choice
In Soil Moisture 302, Leo Rivera, Research Scientist at METER, teaches which situations require saturated or unsaturated hydraulic conductivity and the pros and cons of common methods used to measure both parameters. Find out:
• When to measure saturated hydraulic conductivity
• When to measure unsaturated hydraulic conductivity
• Instruments that measure each parameter
• The technology behind each instrument
• Advantages vs. disadvantages of each method
It is about hydraulic conductivity and flow of water under ground .It will tell you about how water flows through hydraulic gradient .it will brief you about test which are performed to determine hydraulic conductivity .and experimental approach of it .
DSD-INT 2019 Fine sediments - transport in suspension, storage and supply - F...Deltares
Presentation by Prof. Dr. Mário J. Franca, IHE Delft & Delft University of Technology, The Netherlands, at the Delft3D - User Days (Day 3a: River morphodynamics), during Delft Software Days - Edition 2019. Wednesday, 13 November 2019, Delft.
Two researchers show easier methods conform to standards
If you’re measuring saturated hydraulic conductivity with a double ring infiltrometer, you’re lucky if you can get two tests done in a day. For most inspectors, researchers, and geotechs—that’s just not feasible. Historically, double ring methods were the standard, however the industry is now more accepting of faster single ring methods with the caveat that enough locations are tested. But how many locations are enough?
Triple the tests you run in a day
Drs. Andrea Welker and Kristin Sample-Lord, researchers at Villanova University, are changing the way infiltration measurements are captured while keeping the standards of measurement high. They ran many infiltration tests with three types of infiltrometers with a variety of sizes and soil types. In this 30-minute webinar, they’ll discuss what they found to be the acceptable statistical mean for a single rain garden. Plus, they’ll reveal the pros and cons of each infiltrometer type and which ones were the most practical to use. Learn:
- What types of sites were tested
- How the spot measurements compared with infiltration rates over the whole rain garden
- Pros and cons of each infiltrometer and how they compared for practicality and ease of use
- What is an acceptable number of measurements for an accurate assessment
Many researchers measure evapotranspiration and precipitation to understand the fate of water—how much is deposited and how much is used and leaving the system. But if you only measure withdrawals and deposits, you’re missing out on water that is (or is not) available in the soil moisture savings account. Soil moisture is a powerful tool you can use to predict how much water is available to plants, if water will move, and where it’s going to go next. Understanding soil moisture is more than just measuring the amount of water in soil. Learn the basic principles you need to know before you choose how to measure it.
Presented by: Chris Chambers, METER Environment
Terrigenous sediment dynamics in a small, tropical, fringing-reef embaymentalexmessina
Final presentation to the Coral Reef Advisory Group (CRAG) and the American Samoa Environmental Protection Agency (ASEPA) on the doctoral dissertation work by Dr. Alex Messina
5 Reasons You’re Getting Less Accurate Soil Moisture Release CurvesMETER Group, Inc. USA
How do I characterize expansive soils? Will water drain through the soil quickly or be retained? How can I predict deep drainage or runoff?
What if you could get an inside picture of the soil moisture relationships that cause these issues?
A soil-water characteristic curve shows the relationship between water content and soil suction. And it’s one of the most powerful diagnostic and predictive tools.
Learn about what soil-water characteristic curves are and why they’re so powerful.
by Leo Rivera, METER Research Scientist
Water potential is the most fundamental and essential measurement in soil physics because it describes the force that drives water movement. Making good water potential measurements is largely a function of choosing the right instrument and using it skillfully. In an ideal world, there would be one instrument that simply and accurately measured water potential over its entire range from wet to dry. In the real world, there is an assortment of instruments, each with its unique personality. Each has its quirks, advantages, and disadvantages. Each has a well-defined usable range.
Which sensor is right for you?
In this 20-minute webinar, METER research scientist Leo Rivera discusses how to choose the right field water potential sensor for your application.
Learn:
• Why you should measure water potential
• Which part of the water potential range each sensor measures
• The technology behind each method: tensiometers, granular matric sensors, heat dissipation sensors, thermocouple psychrometers, and capacitance sensors.
• The pros and cons of each method
• Which sensors are best for certain applications
Two researchers show easier methods conform to standards
If you’re measuring saturated hydraulic conductivity with a double ring infiltrometer, you’re lucky if you can get two tests done in a day. For most inspectors, researchers, and geotechs—that’s just not feasible. Historically, double ring methods were the standard, however the industry is now more accepting of faster single ring methods with the caveat that enough locations are tested. But how many locations are enough?
Triple the tests you run in a day
Drs. Andrea Welker and Kristin Sample-Lord, researchers at Villanova University, are changing the way infiltration measurements are captured while keeping the standards of measurement high. They ran many infiltration tests with three types of infiltrometers with a variety of sizes and soil types. In this 30-minute webinar, they’ll discuss what they found to be the acceptable statistical mean for a single rain garden. Plus, they’ll reveal the pros and cons of each infiltrometer type and which ones were the most practical to use. Learn:
- What types of sites were tested
- How the spot measurements compared with infiltration rates over the whole rain garden
- Pros and cons of each infiltrometer and how they compared for practicality and ease of use
- What is an acceptable number of measurements for an accurate assessment
Many researchers measure evapotranspiration and precipitation to understand the fate of water—how much is deposited and how much is used and leaving the system. But if you only measure withdrawals and deposits, you’re missing out on water that is (or is not) available in the soil moisture savings account. Soil moisture is a powerful tool you can use to predict how much water is available to plants, if water will move, and where it’s going to go next. Understanding soil moisture is more than just measuring the amount of water in soil. Learn the basic principles you need to know before you choose how to measure it.
Presented by: Chris Chambers, METER Environment
Terrigenous sediment dynamics in a small, tropical, fringing-reef embaymentalexmessina
Final presentation to the Coral Reef Advisory Group (CRAG) and the American Samoa Environmental Protection Agency (ASEPA) on the doctoral dissertation work by Dr. Alex Messina
5 Reasons You’re Getting Less Accurate Soil Moisture Release CurvesMETER Group, Inc. USA
How do I characterize expansive soils? Will water drain through the soil quickly or be retained? How can I predict deep drainage or runoff?
What if you could get an inside picture of the soil moisture relationships that cause these issues?
A soil-water characteristic curve shows the relationship between water content and soil suction. And it’s one of the most powerful diagnostic and predictive tools.
Learn about what soil-water characteristic curves are and why they’re so powerful.
by Leo Rivera, METER Research Scientist
Water potential is the most fundamental and essential measurement in soil physics because it describes the force that drives water movement. Making good water potential measurements is largely a function of choosing the right instrument and using it skillfully. In an ideal world, there would be one instrument that simply and accurately measured water potential over its entire range from wet to dry. In the real world, there is an assortment of instruments, each with its unique personality. Each has its quirks, advantages, and disadvantages. Each has a well-defined usable range.
Which sensor is right for you?
In this 20-minute webinar, METER research scientist Leo Rivera discusses how to choose the right field water potential sensor for your application.
Learn:
• Why you should measure water potential
• Which part of the water potential range each sensor measures
• The technology behind each method: tensiometers, granular matric sensors, heat dissipation sensors, thermocouple psychrometers, and capacitance sensors.
• The pros and cons of each method
• Which sensors are best for certain applications
Effect of Submergence on Flow Measurement in a 90 degree WeirSophia Zumot
This study involved laboratory tests performed in a 90-degree triangular weir to determine errors in measured flow rates using standard weir equations at various levels of submergence. Submergence was measured by determining the ratio of head levels, with respect to the weir’s notch, in the weir afterbay (H2) to the head level in the forebay (H1). Calculations helped determine the level of submergence that began to cause excessive (over 5%) error in measured flow rate due to the rise of the water level in the afterbay. The 5% error is often used as a maximum acceptable error by agencies that regulate industrial waste flow meters (Los Angeles County Sanitation Districts, 2011). Thus, the goal of this work is to determine the maximum permissible submergence in the weir without causing excessive errors in flow measurement.
The research project was conducted by senior civil engineering students Sophia Zumot and Carolina Sanchez under the direction of project adviser Dr. Jose Saez.
Poster prepared by Mahtsente Tibebe, Birhanu Zemadim, Dereje Haile and Assefa Melesse at the Nile Basin Development Challenge (NBDC) Science Workshop, Addis Ababa, Ethiopia, 9–10 July 2013
Managing Cultural Resources in Water Infrastructure through the Framework of the TRWD/DWU IPL Project by: Mason D. Miller, M.A. AmaTerra Environmental, Inc. Austin, TX - Las Cruces, NM - TWCA Annual Convention 2015
Ronald T. Green, Ph.D., P.G., F. Paul Bertetti, P.G.,
and Nathanial Toll Geosciences and Engineering Division Southwest Research Institute® Presented on behalf of the Irrigation Panel - TWCA Annual Convention 2015
Use of environmental tracers for estimating rates of groundwater recharge to the gulf coast aquifer system in montgomery county texas
1. U.S. Department of the Interior
U.S. Geological Survey
Use of Environmental Tracers for
Estimating Rates of Groundwater
Recharge to the Gulf Coast Aquifer
System in Montgomery County,
Texas
by Timothy D. Oden
Prepared in Cooperation with Lone Star Groundwater
Conservation District
Texas Water Conservation Association
70TH Annual Convention
The Woodlands, Texas
March 6, 2014
2. Groundwater Recharge is Not Easily
Measured
Recharge is not easily measured, often is
estimated from other methods
Coupled recharge determinant methods
would be helpful
age-dating (this study)
water-table fluctuation
chloride tracer method (saturated or unsaturated
zone)
Streamflow-hydrograph separation
3. What is Groundwater Recharge...
...generally, the replenishment of water to a
groundwater flow system
...is an integral part of the hydrologic cycle
that may have started as precipitation
...precipitation that first infiltrates the
exposed sediments at land surface, moves
downward through the sediments until it
reaches the water table, at which point it is
part of the groundwater flow system of the
Gulf Coast Aquifer
5. What is NOT Groundwater Recharge...
...equivalent to infiltration
most water that infiltrates at land surface is
returned to the atmosphere
...equated with percolation
percolation is the movement of water through the
unsaturated zone
...to be confused with aquifer yield
this is the amount an aquifer can yield to pumping
...the same as sustainable yield
recharge can be less than sustainable yield
6. Environmental Tracers in this Study
Modern (1940s to present)
Chlorofluorocarbons (CFCs)
Sulfur hexafluoride (SF6)
Tritium (3H)
Helium/ Tritium (3He/3H)
Intermediate (100-1000 years)
Helium-4 (4He)?, maybe
Paleowaters (1,000 to 40,000 years)
Carbon-14 (14C)
Not dating the water, but a substance IN the
water
7. The Model – Piston Flow
Piston flow is the simplest transport
assumption in groundwater age dating
Assumes no mixing or dispersion has altered
the concentration after entering the system
Most likely, an oversimplification
effects of mixing and dispersion beyond the scope
of this study
8. Variables needed for Recharge Rate
Estimation
The known or to be to determined:
H, aquifer thickness
z, depth in the aquifer
x, width of aquifer outcrop
xo, distance from well to beginning of flow path
e, porosity
9. Idealized flow in simple aquifer
type
Modified from Cook and Herczeg, 2000
Piston flow
– Lines of
equal age
Recharge
x
H
z
xo
e of the aquifer
10. Study Design
2008
37 wells, collected CFC, SF6, 3He/3H, 3H, 4He, and
dissolved gas data
Chicot – 17 wells
Evangeline – 13 wells
Jasper – 7 wells
2011
24 wells, collected 14C, major ions, 4He and
dissolved gas data (select wells)
Chicot – 7 wells
Evangeline - 8
Jasper – 9
11. Chicot Recharge Estimates
Based on 14 wells –
Not all wells sampled in the Chicot
Aquifer for this study were usable for
recharge determination
Ranged from 0.2 to 7.2 inches per year
About 0.4 to 14.6 percent of normal
annual precipitation*
*normal annual precipitation from 1971-2000,
COOP Weather Station 411956, Conroe, Texas
13. Evangeline Recharge Estimates
Based on 9 wells –
Not all wells sampled in the Evangeline Aquifer for
this study were usable for recharge determination
Ranged from less than 0.1 to 2.8 inches per year
About 0.2 to 5.67 percent of normal annual
precipitation
15. Jasper Recharge Rates
Based on 10 wells –
Not all wells sampled in the Jasper Aquifer for this
study were usable for recharge determination
Ranged from less than 0.1 to 0.5 inches per year
About 0.2 to 1.01 percent of normal annual
precipitation
17. Uncertainty –
Unconfined
System
modifying each
variable, the
rate changes –
blue and black circles, values from the report
apparent gw age
gw age, +10 percent
gw age, -10 percent
20 percent, porosity
25 percent, porosity
30 percent, porosity
aquifer thickness, +50 ft
aquifer thickness, -50 ft
Chicot Evangeline
Jasper
18. Uncertainty –
Confined
System
blue and black circles, values from the report
apparent gw age
gw age, +10 percent
gw age, -10 percent
20 percent, porosity
25 percent, porosity
30 percent, porosity
aquifer thickness, +50 ft
aquifer thickness, -50 ft
modifying each
variable, the
rate changes –
JasperEvangeline
19. Limitations of this study
1) Highly variable hydrogeology on a regional
scale
2) Piston flow is likely oversimplification
3) Porosity, used were previously determined
4) Possibility of mixing within system not
considered
5) The rates are point (site) specific
6) Interpretation of the environmental tracer
data can be complicated along the flow path
20. Publications
Oden, T.D., 2011, Groundwater environmental tracer data collected
from the Chicot, Evangeline, and Jasper aquifers in Montgomery
County and adjacent counties, Texas, 2008: U.S. Geological
Survey Data Series 580, 37 p., http://pubs.usgs.gov/ds/580/
Oden, T.D. and Truini, Margot, 2013, (revised May 31, 2013)
Estimated rates of groundwater recharge to the Chicot, Evangeline
and Jasper aquifers by using environmental tracers in
Montgomery and adjacent counties, Texas, 2008 and 2011: U.S.
Geological Survey Scientific Investigations Report 2013–5024, 50
p., http://pubs.usgs.gov/sir/2013/5024/
Oden, T.D., and Delin, G.N., 2013, Groundwater recharge to the
Gulf Coast aquifer system in Montgomery and Adjacent Counties,
Texas: U.S. Geological Survey Fact Sheet 2013–3043, 6 p.,
http://pubs.usgs.gov/fs/2013/3043/.